ash: Add a bluetooth entry in the uber tray.

ash/system/tray/tray_item_more.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ASH_SYSTEM_TRAY_TRAY_ITEM_MORE_H_
+#define ASH_SYSTEM_TRAY_TRAY_ITEM_MORE_H_
+#pragma once
+
+#include "ui/views/view.h"
+
+namespace views {
+class ImageView;
+}
+
+namespace ash {
+namespace internal {
+
+class TrayItemMore : public views::View {
+ public:
+  TrayItemMore();
+  virtual ~TrayItemMore();
+
+  void AddMore();
+
+ private:
+  // Overridden from views::View.
+  virtual void Layout() OVERRIDE;
+
+  views::ImageView* more_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrayItemMore);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_TRAY_TRAY_ITEM_MORE_H_